Improvement in flufd-meters



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Inventar .5mm @anni wwessseew Letters .Patent No. 91,989, dated JmeQf), 1869.

IMPROVEMENT IN FLUID-METERS.

The Schedule referred to in theseLettei-s Patent and making part ofthe Same.

To whom it may concern f l Be it known that I, J. B. VAN DEUSEN, of New York, in the county oi' New York, andv State ot' New York, have invented certain new and uset'ul Improvements in Fluid-Meters; and l 4hereby declare the following to be a full, clear, 'and exact description otl the same, reference being had to the accompanying drawings, in which- Figure 1 represents a horizontal section on the line a; tig. 5, oi a meter made in accordance wthmy illvention, the piston in No. 1 of the two cylinders being at halt' stroke, and the piston in No. 2, at the end of its stroke. y f

Figure 2 is alike section of the same ont-he line y y, fie- 5- Figure 3 is a perspective view of the meter on the side 0f N0. 2 cylinder, with alportion broken away to show the arrangement of the openings and `passage- Ways.

Figure 4 is a like view, looking from the side of No. 1 cylinder.

Figure 5 is a transverse vertical central section of the meter.

Figure 6 is a perspective view of one of rthe pistons detached.

,lhe meter, which is the subject ofthe present patent, consists ot' a pair ot cylinders haring a. counnon inlet and outlet,.provided each with a hollow slidevalve, haring preferably the form ot' a cylimler closed at both ends, and connnunicating with one another in the manner hereinafter described, whereby the hollow Divali?, or piston, as it may he termed, in the one cylinder, is made to control automatically the supply and delivery ofthe liuid to the other cylinder, and

friet: tersa, so as to obtain a. positive automatic recip-V rocatingmovement ct the pistons without the aid ot other mechanism, each, when in motion, opening and closing the channels through which the liuid acts upon the other.4

ln connection with the meter constructed upon this general plan, l employ a registering-appzu'atus, con nected with the two moving-pieces or pistons by a crank, which, while actuating the register, serves also to regulate thc-lengthot' stroke ofthe piston, s o as to always measure the same quantity of iluid for each revolution, and ith the same accuracy.

While prelerling, however, to employ the crank for this double purpose, other means may be employed i'or registering, as wcll as for regulating the length of stroke;

1n order to efTect the movement of the piston above described, it is necessary that the channels in the meter between the two cylinders, vand the valve-ports and seats in the pistons, which open and close suchpassages, should bear a certain tixcd relation to each other. This, however, can best be explained by reference to the` accompanying drawings, which I will now proceed to describe, in order that the nature ot' my invention may bel'ully and clearly cmnprehemled.

. The two cylinders, ot' which the body of the metier is composed, are marked No. 1 and yNo. 2. They lie sidehy side, and between `them is the valve-seat piece,

in which are located the horizontal channels or passageways, through which the'flnid acts.

Under the cylinders is Vthe inlet-chamber Arwhich the induction A* enters. n g

This chan'iber, in which the sediment and other impurities aredeposited, opens into the cylinders; and the latter are also open ati the top, (where a chamber, .13, is forme-d in which the regstern|g-appa|atns is located,) so that there is free communication between the chamber A, the cylinders and thc chamber Il, the

-ludfilling all parte ofthe meter, including the hollow pistons, as hereinafter indicated.

Within, but separate from the chamber A, isI the discharge or eduction-chamber C, provided with the outlet U', and connnunieating with the` cylinders through the central conduit u, which opens into the inner side of No. l cylinder, midway between its two ends, and through the conduit a', whiclropens at a cori-espomling point into cylinder N o. 2.

I desire here to say that the arrangement of the bottom chamber A and upper chamber B maybe variously modified, all that` is necessary being that there should be free communication between the two cylinders, as above speciiied.

Indeed, the bottom chamber maybe dispensed with entirely, the inlet A opening directly into either cylinder.

Having sniiiciently explained the manner in which the cylinders are combined, I now proceed to describe the armngement ot' the channels through which the 4 iiuid is caused to act upon the pistons, this, together' with the pistons themselres, constituting the rmost essential part ot' my invention.

vThese channels, as aboveimlcated, are located between t-he cylinders, and as the pressure of the (luid `is to be exerted on the ends ot' the pistons, it is necessary that the channels should open into the ends of the cylinders.

Coniining attention to the channels through which the tluid acts upon the piston 'in cylinder No. 1, the manner in which they are placed will be fully understood by reference to ligs. i and 4.

There are two channels, b c. The one, b, has: its port, b', at one end ofthe cylinder, and extendsdingo;` ually across. to near the c mtre oi"cylinder No. 2, into which it opens,'at bi, upm that side ot' the central opening a, nearest, the end of cylinder No. l, in which the portb' is located. The other, 0,'has its port c* at the opposite end ot' cylinder N o. l, and extendsdiag nally across to cylinder N o. 2, into which it opens, at

at di, but upon that side of the central opening a farthest removed from thc port d.

The channel f has its port j" at the opposite end of cylinder No. 1, and thence extending diagonally across to cylinder No. 2, passing above the channel c, enters the latter cylinder at f on that side of the central opening` a., opposite to di.

It will he seen that all these diagonal channels are entirely distinct, and have no direct communication with each other, and that they are arranged, as it were, in two tiers, as shown in tigs. 3, 4, and 5, and in dotted lines, tig. 1, d and f constituting the upper tier, and l and c the lower tier; and, further, that while the. channels b c do not cross each other, they are crossed by d f, which latter also cross each other near the centre of the meter, or between the two openings a a.

, This arrangement'of the two sets is quite essential, for were the channels d f to open into the centre of cylinder No. 1, in the same manner as the channels b c open into cylinder No. 2, the pistons would not work, as will be made apparent hereafter.

The construction ot' the pistons, or hollow D-slide valves, which move in the two cylinders, is shown plainly in tig. (i.

Each piston D is double-headed, and made hollow,

with openings in its centre, through which the tluid passes and fills its interior. Upon that side ot' the pistou which adjoins the central channel-ports and conduits, are termed valve-openings g g", and a cup or cavity, h.

Supposiug that the piston D is that which belongs to cylinder No. 1, the central cavity or recess h. will correspond tothe discharge-opening a, the lower valveopening g to the port di and the upper valve-opening g to the port f2, and the piston ot' cylinder No. 2 is constructed in a like manner.

The relation which the parts g, g, and h of each pis- Y(ton must bear to'their corresponding openings in the cylinder, can best be illustrated by supposing the width ofthe central discharge-opening a, to be one inch, the distance between it and the ports d2 j" on .l each side to be one-quarter of an inch, and the width of each port to be one inch.`

In sncl1-casc,in order to be perfectly adapted for operation, the central cavity 7i. should be about one inch and a half wide, and the dista-nce between it and each valve-opening g g, one inch, as seen at i t', so that when the piston is at halt' stroke, the central cavity h will cover the opening a and vthat partof the cylinder intervening between the opening and the ports d2 fl, whilethe parts i i' of the pistou will cover the ports (F f2.

From this it will be seen that `the moment the piston moves beyond the centre, say in the direction ot' the arrow in lig. 1, the cavity h will be brought partly over the port fi, from which the water passes down f through the discharge a, while at the same time the valve-opening g is brought over ythe port di, thus allowing the inlet-water within the piston to pass through l to the end of the other piston, which is consequently put in motion. The piston, therefore,

.at both ends.

slt-oso in lthis instance, can have a two-inch stroke, just double the width of the parts a, di, and fl, and this relation between the length of stroke of the piston, and the width of these parts should always be maintained. If, for instance, it he desired to vhave a fourinch stroke, the width ot' the central channel-ports and discharge-openings should be two inches, the width of the cavity It and valvescats t' il should be proportionately increased, and so on.

The manner in which the meter operateswill be understood by reference to figs. land 2, where the. piston D, in cylinder 1, is at halfstroke, and that in cylinder 2 is at the end of its stroke, the inlet-pipe A is open, the outlet-pipe C' is closed, and all parts ol' the meter, cylinders, and pistons, and passage-ways, are filled with water, or other fluid, at the same pressurel which exists in the main pipe.

In this position, itwill be seen that the piston in.

cylinder No. 1 closes the. channels tlf, leading to cylinder No. 2, while, on the other hand, the central cavity h, in piston No. 2, will be partly over thedischarge-opening a' and the port b2, and the valveopening 11 of the piston will he ovel the port ci.

N ow, it' the discharge-pipe C be opened, water will flow from the end ot' cylinder No.1,through the channel b, passing from its port b2, into the central cavity h of piston No.2, and thence down into the dischargechan'iber C, and out through the pipe C', pressure upon the one end thus heilig reduced.

At the same time, the inlet-water, with full press.- ure, will pass through the valve g in piston No. 2, and the port ci and channel c, into the other end of cylinder No. 1, pressing against t-he end ofthe piston and forcing it to move in the direction of the arrow;` but no sooner does the piston in cylinder N o. 1 pass the centre, than yits cavity hopens the port ft, and its mike-opening g comes over the port d", and the liquid now passes from one end of cylinder No. 2, through the channel f, down the discharge-opening a,'and out from the pipe C', while the full pressure of the tlnid is exerted through the valve-mening g and channel ll upon the opposteend of piston No. 2, which thus commences its reverse movement; and in this mauuer each piston acts alternately to open and close the channels and passages through which the liquid acts upon the other, and so long as the slightest pressure is maintained, it sutiices to produce this automatic rel ciprocating movement of' thelpistons.

For the further elncidation of this portion of my invention, and in order to clearly present its essential characteristic, I have appended an explanatory diagram, (see sheet 2,) which will now be described.

The moving pieces D D each consists ot'y a hollow D-slidc valve, with ports, .and the D-cavity, madepreferably, as above stated, in the form of a cylinder closed The tace of these valves will be cylindrical, uniform with the surface of the cylinder D D', ot' which they forni a part..

lhe valve-cylinders are placed in working-cylinders 1 and 2, which are closed at the ends, and of suiticient length to allow the slide-valve cylinders to have such extent of endwise movement as may he intended.

The cylinders D D' till the inside of cylinders 1 and 2 as near water-tight as maybe, and allow perfect freedom of motion.

When the cylinders D D are placed in the cylinders l and 2, the ends otl l and 2 are closed.

The cylinders` 1 and 2 are in a water-box,v and are placed in the same plane, parallel to each other.

A2 A are openings in. cylinders l and 2', by which water can pass into the valve-cylinders through openings, F 1*", at the centre.

sediment-chamber, and the outlet, or disoharge-clmmof brass or other sheet-metal, substantially as and lfor ber, substantially as `shown and specified. the purposes set, f'orth.

` 4. The combination, with the reciprocating vnlve- In testimony whereof, I have signed my nume to this cylinders, or pistons, of the cranks and shaft, for speccntiombefore two subscribingwitnesses. actuating the register and regulating the length of J. B.' 'VAN DEUSEN. stroke ot said valve-cylinders, substantially as shown 'itnesses: :md described. JACOB CARPENTER,

5. The formation of the cylindrical ralve-pjstons, T. V. JARvIs GumsroruERs. 

